Miss. Code Ann. § 13-5-65: Miss. Code Ann. § 13-5-65

After the drawing of the grand jury, the remaining jurors in attendance shall be impaneled into three petit juries for the first week of court if there be a sufficient number left, and, if not, the court may direct a sufficient number for that purpose to be drawn and summoned. If there be more than enough jurors for the three juries, or for two juries if the court shall direct only two to be impaneled, the excess may be discharged, or they may be retained, in the discretion of the court, to serve as talesmen. If so retained, they shall have the privilege of members of the regular panel, of exemption from service.